How to define a dynamic 2D array

[mmag]

my professor said one way for declaration dynamic 2d arrays.

int **a=new int *[m];
int *x=new int[m*n];
int *y=x;
for(int j=0;j<m;j++)
{
a[j]=y;
y+=n;
}

and i never understand this way.like what does y or x in this code.I want a person explain how works this code.if show with a image is better.thanks

[donbock]

Read the Arrays Revealed article. Let us know if you still have questions after that.